Why compiled application need msvcr120.dll in customer's PC?

brucezcg

I compile my project with QT5.9.1(mingw)

Why it need msvcr120.dll in customer's PC, and how to resolve this to my app package?
Thanks.

jsulm

@brucezcg Take a look at http://doc.qt.io/qt-5/windows-deployment.html

Buckwheat

@brucezcg
I have noticed in the dependency walker that, at least in Qt5.11.2 using mingw53 that the libgcc_s_dw2-1.dll requires msvcrt.dll. This is probably why you need the msvcrt120.dll.

If you totally wish to do away with M$VC, try using the MSYS2 distribution.

JonB

@brucezcg
From what I read it appears MinGW has always used msvcrt.dll.

If you do not want that, something like https://sourceforge.net/p/mingw-w64/mailman/message/31883429/ says

You can link it statically by using -static-libgcc.

[EDIT Hmm, not sure whether that only avoids dependency on libgcc.dll or on msvcrt.dll too, you'll have to give it a go... Wait! Good news. Elsewhere:

You might also want to link libgcc statically using -static-libgcc to prevent the libgcc DLL pulling in msvcrt.dll.

]

brucezcg

Thanks for all of you.
I found the problem is caused by I used dll make by MFC,
Now I get rid of the dll, now it do not need MSVCRT120.dll now.